Apparatus and method for generating 3D printing model using multiple textures

1. An apparatus for generating a 3D printing model using multiple textures, the apparatus comprising:

a mobile device; and further comprising:

a template model storage unit configured to store template models that are 3D models previously manufactured to be printable;

a 3D model conversion unit configured to, upon receiving a 3D input model and a texture image, perform mesh deformation on the template model stored in the template model storage unit by using geometric information about the 3D input model;

a texture processing unit configured to assign the texture image to the 3D model having being subjected to the mesh deformation; and a 3D printing model output unit configured to output a geometric model and a texture image of the template model which are finally calculated, wherein the texture processing unit comprises:

a correspondence setting unit configured to calculate a correspondence between the 3D input model and the template model having finished the mesh deformation, and search for a triangle of the deformed model which corresponds to each vertex of the 3D input model;

a validity check unit configured to compare a reconstruction area of the 3D input model with a reconstruction area of the template model to calculate a part of texture areas of the template model to which a texture needs to be newly assigned;

a texture warping unit configured to warp a triangle of the input texture image into a triangle of a texture of the template model with respect to a valid area based on the set correspondence; and

a color matching unit configured to transform a remaining part of the texture areas of the template model to have a same color as a color of the texture of the input model.

2. The apparatus of claim 1 , wherein the validity check unit sets a minimum area in consideration of a viewing direction of a user and a normal direction of a model.

3. The apparatus of claim 1 , wherein the texture warping unit calculates a vertex value through interpolation with respect to inside of a triangle of the template model corresponding to the input 3D model.

4. A method for generating a 3D printing model using multiple textures, the method comprising:

receiving a 3D input model and a texture image; performing mesh deformation on a template model that is a 3D model previously manufactured to be printable, by using geometric information about the 3D input model;

assigning the texture image to the 3D model having being subjected to the mesh deformation; and outputting a geometric model and a texture image of the template model which are finally calculated, wherein the assigning of the texture image comprises:

calculating a correspondence between the 3D input model and the template model having completed the mesh deformation, and searching for a triangle of the deformed model which corresponds to each vertex of the 3D input model;

calculating a part of texture areas of the template model to which a texture needs to be newly assigned by comparing a reconstruction area of the 3D input model with a reconstruction area of the template model;

warping a triangle of the input texture image into a triangle of a texture of the template model with respect to a valid area based on the set correspondence; and

transforming a remaining part of the texture areas of the template model to have a same color as a color of the texture of the input model.

5. The method of claim 4 , wherein the calculating of a part of texture areas of the template model to which a texture needs to be newly assigned includes setting a minimum area in consideration of a viewing direction of a user and a normal direction of a model.

6. The method of claim 4 , wherein the warping of a triangle of the input texture image into a triangle of a texture of the template model includes calculating a vertex value through interpolation with respect to inside of a triangle of the template model corresponding to the input 3D model.